METHOD FOR OPERATING A ROLLER BAR SCREEN

摘要

The invention relates to a method for operating a roller bar screen and to the generation of certain parameters for optimal adaptation to the bulk material being processed and as a prerequisite for process optimisation. Construction measures- essentially equipping the rollers with variable speed drive mechanisms- are taken in a first preparatory step. Selected control variables and limit values related to the average characteristics to be expected of the bulk material are generated in a single operation by means of a regulation and process control system. The optimum number of revolutions for each individual roller in particular is predetermined in dependence on the process. The rollers can be grouped together. The dynamics of the roller bar screen are monitored and influenced by a regulating system which is characterised by the following; 1) determination of the quantity of the bulk material, the level of the bulk material in the area of the screen train and the power consumed by the motor as minimal information and determination of other optional information, using sensors; 2) forwarding this information to a processing and evaluating unit; 3) processing and evaluating in the same using known information processing technology and specially developed algorithms, more specifically, determining the screen filling contour and modelling the same and superimposing the information relating to the number of revolutions with periodic functions to obtain various control values; and 4) outputting these control values, essentially information relating to the number of revolutions of the roller drive mechanisms.